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A body is moving with a constant acceleration of 4î + 3ĵ, starting from the origin. What will be the position of the body after 5s?(a) 50î + 37.5ĵ(b) 37.5î + 50ĵ(c) 37.5î –50ĵ(d) 50î – 37.5ĵI got this question during a job interview.The above asked question is from Motion in a Plane topic in section Motion in a Plane of Physics – Class 11

Answer»

The CORRECT answer is (a) 50î + 37.5ĵ

Explanation: The body’s displacement is given by s = (1/2)at^2. The body starts from the origin hence, the TOTAL displacement is the final position of the body. THEREFORE, after putting in the values, we GET, s = (1/2)(4î + 3ĵ)*5^2 = 50î + 37.5ĵ.



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